@Embedded should use the field name as a prefix for the fields of the embedded objects. --------------------------------------------------------------------------------------- Key: HHH-1551 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1551 Project: Hibernate Core Issue Type: New Feature Components: core Affects Versions: 3.1.2 Reporter: Michael Newcomb Original Estimate: 8h Remaining Estimate: 8h @Embeddable class Vector3f { double getX() double getY() double getZ() } @Entity class Foo { @Embedded Vector3f getVelocity(); @Embedded Vector3f getOrientation(); } I get some errors from Hibernate about multiple columns in the Foo table. The only way it works is if I add @AttributeOverrides and specify unique columns for each embedded object. @Entity class Foo { @Embedded @AttributeOverrides( { @AttributeOverride(name="x", column=@Column(name="velocity_x")), @AttributeOverride(name="x", column=@Column(name="velocity_y")), @AttributeOverride(name="x", column=@Column(name="velocity_z")) } Vector3f getVelocity(); @Embedded @AttributeOverrides( { @AttributeOverride(name="x", column=@Column(name="orientation_x")), @AttributeOverride(name="x", column=@Column(name="orientation_y")), @AttributeOverride(name="x", column=@Column(name="orientation_z")) } Vector3f getOrientation(); } This is, IMHO, incredibly stupid. We are embedding the structure of the embedded class... WTF good is the embedded class? What happens when I want to add a member? Or change the names? Now, in older JBoss versions, the CMP container added the field name of the embedded class as a prefix to the fields in the embedded class. Much like the above: velocity_x velocity_y velocity_z orientation_x orientation_y orientation_z Thanks, Michael